As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
PILOT REPORTED PITOT HEAT SWITCH WOULD NOT STAY IN THE ON POSITION. ON TROUBLESHOOTING TECH FOUND CIRCUIT BREAKER/SWITCH TO BE AT FAULT. AD 2008-13-17 HAD BEEN COMPLETED 2427 FLIGHT HOURS PRIOR. RECOMMEND MFG DEVELOP A MORE DURABLE CIRCUIT BREAKER OR ACFT MFG LOOK FOR A DIFFERENT MANUFACTURER FOR ITS CIRCUIT BREAKERS.